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What is compound?

  1. It forms when two or more elements are chemically combined
  2. It is the smallest unit of a substance
  3. Both A and B
  4. None of the above

Answer: It forms when two or more elements are chemically combined


Long Answer:

Compound is the chemical composition of two or more elements. Example: Copper sulphate, Sodium chloride and Magnesium hydroxide.